SL PRS Resource Selection by Sensing for Low-Interference TDOA Positioning
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource allocation for sidelink positioning reference signals (SL PRS) to optimize communication between user equipment (UEs) without causing interference, particularly in scenarios requiring high reliability and low latency.
Innovation Solution
A method and apparatus for selecting SL PRS transmission resources by determining candidate resource sets based on sensing and ensuring non-overlapping transmission to minimize interference, using a processor and memory to execute instructions for resource selection and signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource allocation for SL PRS is optimized to enhance reliability and reduce latency, then communication efficiency between UEs is improved, but resource management complexity increases
Solution Approach 1:
The patent applies preliminary action by having each UE perform sensing in advance to determine candidate resource sets before actual signal transmission. The first UE determines a first candidate resource set and the second UE determines a second candidate resource set based on prior sensing operations, enabling reliable resource allocation without increasing operational complexity during transmission
Solution Approach 2:
The patent implements feedback mechanisms where UEs exchange information about their candidate resource sets. The first UE receives information about the second UE's candidate resource set and uses this feedback to select transmission resources that avoid interference, thereby enhancing reliability while maintaining manageable complexity through iterative refinement
2Object-affected harmful factors
If sensing operations are performed to determine non-overlapping resource sets, then transmission interference is minimized, but processing time and latency increase
Solution Approach 1:
The patent applies partial action by having each UE determine only the necessary candidate resource sets based on their local sensing results rather than exhaustively analyzing all possible resources. The first UE determines a first candidate resource set and the second UE determines a second candidate resource set, selecting only the essential resources needed for interference-free transmission
Solution Approach 2:
Sensing operations are performed in advance to identify suitable resources before actual transmission occurs. This preliminary determination of candidate resource sets enables the system to avoid interference during transmission while minimizing processing time by completing sensing before the critical transmission window
3Productivity
If candidate resource sets are determined based on sensing results, then resource allocation efficiency is improved, but device complexity and computational requirements increase
Solution Approach 1:
The patent segments the resource allocation process into distinct phases: sensing phase where each UE independently determines candidate resource sets, and selection phase where UEs exchange information and finalize transmission resources. This segmentation improves efficiency by enabling parallel sensing operations while managing complexity through structured processing stages
Solution Approach 2:
Each UE performs self-service by independently determining its own candidate resource set based on local sensing results without requiring centralized coordination. The first UE determines its first candidate resource set and the second UE determines its second candidate resource set autonomously, improving allocation efficiency while limiting computational complexity to local operations
Data Source
AI summary
Proposed is a method for operation of a first device (100) in a wireless communication system. The method may comprise the steps of: receiving, from a second device (200), information regarding a first candidate resource set; determining a second candidate resource set on the basis of sensing; selecting a transmission resource on the basis of an intersection of the first candidate resource set and the second candidate resource set; and on the basis of the transmission resource, transmitting a first SL PRS to the second device (200).